Mechanical locking ball valve

Abstract

The utility model provides a mechanical locking ball valve, and belongs to the technical field of valves. The problem that the reliability of anti-theft unlocking is insufficient is solved. The valve comprises a valve body, an unlocking key and a valve rod vertically arranged in the valve body, the valve body is provided with a horizontally-arranged mounting hole, a locking piece is in threaded connection with the interior of the mounting hole, the front end of the locking piece is inserted into the valve rod, the rear end of the locking piece is provided with a matching part, the end face of the matching part is provided with a protruding head in a protruding mode, and the protruding head is sleeved with a check ring which protrudes out of the matching part in the radial direction. The unlocking key comprises an unlocking rod and an outer guide sleeve, the outer guide sleeve is arranged outside the unlocking rod in a sleeving mode, a clamping part is arranged at the front end of the unlocking rod and has elasticity, a concave receding groove is formed in the inner side wall of the clamping part in the radial direction, and after the clamping part is arranged outside the matching part in a sleeving mode, the outer guide sleeve is moved so that the clamping part can contract inwards to be fixed to the matching part in the circumferential direction. When the clamping part and the matching part are fixed in the circumferential direction, the edge of the check ring is located in the receding groove. The anti-theft lock has the advantages of high anti-theft reliability and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves and relates to a mechanical locking ball valve. Background Art

[0002] In order to facilitate the management of water and gas consumption of residents in the community, a ball valve with a locking function is usually installed on the water supply branch pipe or gas supply branch pipe before entering the house. When the user owes fees, the management personnel will close the ball valve and form a locked state. For example, the internal thread lockable ball valve disclosed in the patent application number 201120440716.5 includes a valve body, a valve seat, a ball valve core installed in the valve seat, a valve stem linked to the ball valve core, and a handle installed on the valve stem. A positioning block is fixed on the valve stem, and a notch is provided on one side of the positioning block for the end of the locking screw to be inserted. The locking screw with an axis perpendicular to the valve stem cooperates with the valve body thread, and the tail of the locking screw is provided with a lock hole for the special key to be inserted. The end of the locking screw is inserted into the notch on the side of the positioning block, so that the valve is locked in a closed state and cannot be opened by the user at will. When the valve needs to be opened, the management personnel inserts a special key into the lock hole at the tail of the locking screw and then rotates it, so that the locking screw moves along the thread and separates from the positioning block, so that the valve is no longer locked.

[0003] However, the above-mentioned internal thread lockable ball valve also has some shortcomings: it can be seen from the drawings in its specification that the locking screw is threadedly connected to a hole in the valve body, and the tail position of the locking screw is exposed even in the locked state, which means that if others use needle-nosed pliers to directly clamp the tail of the locking screw, they can also rotate the locking screw, so there is a problem of insufficient reliability in anti-theft opening. Utility Model Content

[0004] The utility model aims to solve the above problems in the prior art and proposes a mechanical locking ball valve to solve the problem of insufficient reliability of anti-theft opening.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] A mechanical locking ball valve comprises a valve body, an unlocking key and a valve stem vertically arranged in the valve body, the valve body having a mounting hole arranged horizontally, a locking piece being threadedly connected in the mounting hole, a front end of the locking piece being inserted into the valve stem, and a matching portion being provided at the rear end of the locking piece, characterized in that a convex head is protruding from the end surface of the matching portion, a retaining ring is connected to the outer outer surface of the convex head, the retaining ring radially protrudes out of the matching portion, the unlocking key comprises an unlocking rod and an outer guide sleeve, the outer guide sleeve is sleeved outside the unlocking rod, a clamping portion is provided at the front end of the unlocking rod, the clamping portion is elastic, and a recessed clearance groove is radially provided on the inner side wall of the clamping portion, after the clamping portion is sleeved outside the matching portion, moving the outer guide sleeve can cause the clamping portion to shrink inwardly to form a circumferential fixation with the matching portion, and the edge of the retaining ring is located in the clearance groove when the clamping portion and the matching portion are circumferentially fixed.

[0007] When the valve is in the closed state, the front end of the locking piece is inserted into the valve stem, so that the valve stem cannot be operated at will by the user. Since the end surface of the matching part is protruding with a convex head, and the convex head is connected to a retaining ring, the retaining ring protrudes radially outside the matching part, which is equivalent to the retaining ring blocking the matching part, so that the user cannot operate the locking piece by directly clamping the needle-nosed pliers outside the matching part. In addition, because the retaining ring is sleeved on the convex head, that is, the retaining ring is free to rotate relative to the locking piece, even if the user clamps the needle-nosed pliers outside the retaining ring, the locking piece cannot be rotated. As a result, the reliability of the anti-theft opening is greatly improved.

[0008] When the manager needs to unlock the valve, the clamping part of the unlocking rod is inserted into the installation hole and sleeved on the outside of the matching part of the locking piece (the clamping part is elastic and expands outward in a natural state without being hindered by the retaining ring). At this time, the clamping part and the matching part are loose. Then, the outer guide sleeve is moved to make the clamping part shrink inward and form a circumferential fixation with the matching part, and the outer edge of the retaining ring is located in the clearance groove. Then, the unlocking rod is rotated to drive the locking piece to rotate, thereby separating the locking piece from the valve stem.

[0009] In the above-mentioned mechanical locking ball valve, the retaining ring is a metal part, and the rear end of the protruding head has an anti-slip retaining edge.

[0010] The retaining ring is a metal part with guaranteed hardness and is not easily damaged by tools such as needle-nosed pliers.

[0011] In the above-mentioned mechanical locking ball valve, the outer side of the retaining ring has a guide cone surface, and the outer diameter of the guide cone surface gradually increases from the rear end to the front end of the locking piece.

[0012] The setting of the guide cone surface can play a guiding role in the sleeve setting of the clamping part outside the matching part.

[0013] In the above-mentioned mechanical locking ball valve, a retaining ring is also threadedly connected in the installation hole, the threaded connection of the locking piece is its front end, the locking piece passes through the retaining ring, and the outer side of the locking piece near the front end is provided with an annular shoulder, and when the front end of the locking piece is inserted into the side of the valve stem, there is a distance between the rear side of the annular shoulder and the front side of the retaining ring.

[0014] The cooperation between the retaining ring and the annular retaining shoulder can limit the rotation distance of the locking piece when the front end is inserted into the side of the valve stem, preventing the locking piece from being rotated too much and falling out of the installation hole. In addition, the retaining ring can also play a protective role to prevent others from violently damaging it with a screwdriver.

[0015] In the above-mentioned mechanical locking ball valve, the inner side of the middle part of the outer guide sleeve is provided with an annular boss, the middle outer sleeve of the unlocking rod is provided with a support spring, a blocking member is fixed outside the unlocking rod, the front end of the support spring abuts against the annular boss, and the rear end of the support spring abuts against the blocking member. When the outer guide sleeve moves backward to overcome the action of the support spring, the clamping part can expand outward under the action of its own elastic force.

[0016] Under normal conditions, the outer guide sleeve is always kept in a position where the clamping part is in a contracted state under the action of the support spring. At this time, the clamping part cannot be directly sleeved outside the matching part of the locking part. When unlocking is required, the outer guide sleeve is manually pushed back to overcome the action of the support spring and maintained in this state, so that the outer guide sleeve releases the constraint on the clamping part, and the clamping part will expand outward under the action of its own elastic force. Then the user inserts the clamping part into the mounting hole and sleeves it outside the matching part of the locking part, and then the user withdraws the push back on the outer guide sleeve, so that the outer guide sleeve will automatically move forward under the elastic force of the support spring and shrink the clamping part inward and form a circumferential fixation with the matching part of the locking part. The elastic force of the support spring continues to act on the outer guide sleeve, so that the clamping part can always maintain a state of forming a circumferential fixation with the matching part, which means that the user does not need to rely on manpower all the time, which greatly improves the convenience of unlocking.

[0017] In the above-mentioned mechanical locking ball valve, the outer side of the rear end portion of the outer guide sleeve is provided with an annular lug.

[0018] The provision of the annular lug makes the overall shape of the outer guide sleeve similar to a syringe, so that the user can pull the outer guide sleeve with the same gesture as a nurse operates a syringe, thereby improving the convenience of the user when operating the unlocking key.

[0019] In the above-mentioned mechanical locking ball valve, the unlocking rod includes a guide rod, and the clamping part includes two petals both of which are arc-shaped plates, and the two petals are metal parts. The rear end side wall of the clamping part has a connecting hole, and the adjacent sides of the two petals have recesses for forming the connecting hole. The front end of the guide rod is located in the rear end of the clamping part, and the side of the guide rod has a connecting head located in the connecting hole. The outer sides of the two petals have force-bearing surfaces near the front end, and the rear ends of the force-bearing surfaces are inclined relative to the front end toward the center line of the guide rod.

[0020] Under normal conditions, the outer guide sleeve is in a state of contracting the clamping part under the elastic force of the support spring. At this time, the inner wall of the front end of the outer guide sleeve is against the front end of the force-bearing surface outside the two petals, so that the front ends of the two petals are gathered together. When the outer guide sleeve is pulled backward, the front end of the outer guide sleeve retreats to the rear end position of the force-bearing surface. At this time, the outer guide sleeve has no restraining force on the front ends of the two petals. The front ends of the two petals will expand outward under the action of their own elastic force (because the two petals are metal parts and are in the shape of arc plates).

[0021] In the above-mentioned mechanical locking ball valve, the front ends of the two petals are protruding with a sheet body, the side of the matching part is symmetrically provided with two connecting planes, the opposite sides of the two sheet bodies have a clamping plane, and the clearance groove is located on the sheet body and behind the clamping plane.

[0022] When the outer guide sleeve is moved to shrink the clamping part, the two clamping planes will be in contact with the two connecting planes, so that the shrunken clamping part and the matching part of the locking piece are circumferentially fixed, so that when the unlocking rod is rotated, the locking piece can be driven to rotate together to unlock.

[0023] In the above-mentioned mechanical locking ball valve, the valve body has a cylindrical neck and a cylindrical mounting portion protruding from the outside of the neck, the neck has an inner hole, the valve stem is inserted into the neck, the mounting hole is located in the mounting portion, a locking hole is provided on the side of the valve stem, and a transition hole is provided at the connection position between the neck and the mounting portion to connect the inner hole of the neck with the mounting hole. When the valve stem is in a state of closing the ball valve, the locking hole is directly connected to the transition hole, and a locking head is provided at the front end of the locking piece, and the locking head is located in the transition hole.

[0024] When the valve stem is in the closed state, the locking hole and the transition hole are directly connected. At this time, by rotating the locking piece toward the mounting hole, the locking head can pass through the transition hole and be inserted into the locking hole to lock the valve stem. When unlocking is required, just rotate the locking piece in the opposite direction to make the locking head escape from the locking hole and enter the transition hole.

[0025] Compared with the prior art, the mechanical locking ball valve is provided with a convex head protruding from the end face of the mating part, and a retaining ring is connected to the outer cover of the convex head. The retaining ring radially protrudes out of the mating part, which is equivalent to the retaining ring blocking the mating part, and the retaining ring is freely rotatable relative to the locking piece, so that the user can neither directly clamp the needle-nosed pliers outside the mating part to operate the locking piece, nor clamp the needle-nosed pliers outside the retaining ring to operate the locking piece, thereby greatly improving the reliability of anti-theft opening. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a cross-sectional view of the mechanical locking ball valve.

[0027] Figure 2 It is a three-dimensional schematic diagram of the mechanical locking ball valve.

[0028] Figure 3 It is a three-dimensional schematic diagram of the locking member.

[0029] Figure 4 is a cross-sectional view of the unlocking key.

[0030] Figure 5 It is a three-dimensional schematic diagram of the unlocking lever in the unlocking key.

[0031] In the figure, 1, valve body; 1a, neck; 1b, mounting portion; 1b1, mounting hole; 2, valve stem; 2a, locking hole; 3, ball core; 4, locking piece; 4a, locking head; 4b, matching portion; 4b1, connecting plane; 4c, convex head; 4c1, anti-slip edge; 4d, annular shoulder; 5, retaining ring; 5a, guide cone; 6, unlocking key; 7, unlocking rod; 7a, clamping portion; 7a1, petal body; 7a11, recess; 7a12, force surface; 7a13, sheet body; 7a14, clamping plane; 7a15, make way groove; 7b, guide rod; 7b1, connector; 8, outer guide sleeve; 8a, annular shoulder; 8b, annular lug; 9, retaining ring; 10, supporting spring; 11, blocking piece; 12, abutment ring; 13, plug rod. DETAILED DESCRIPTION

[0032] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0033] like Figure 1 , Figure 2 and Figure 3As shown, the mechanical locking ball valve comprises a valve body 1 and a valve stem 2 vertically arranged in the valve body 1. A ball core 3 is also arranged in the valve body 1. The lower end of the valve stem 2 is connected to the ball core 3. The upper end of the valve stem 2 extends out of the valve body 1 and is connected to a handle. The valve body 1 has a horizontally arranged mounting hole 1b1. A locking member 4 is threadedly connected to the mounting hole 1b1. The front end of the locking member 4 is inserted into the valve stem 2 to keep the valve stem 2 in a state of closing the valve. Specifically, the valve body 1 has a cylindrical neck 1a and a cylindrical mounting portion 1b protruding from the outside of the neck 1a. The neck 1a has an inner hole. The valve stem 2 is inserted into the neck 1a. The mounting hole 1b1 is located in the mounting portion 1b. The side of the valve stem 2 is provided with a locking hole 2a. The connection position between the neck 1a and the mounting portion 1b has a transition hole for connecting the inner hole of the neck 1a with the mounting hole 1b1. When the valve stem 2 is in a state of closing the ball valve, the locking hole 2a is directly connected to the transition hole. The rear end of the locking member 4 has a locking head 4a, and the locking head 4a is located in the transition hole. The rear end of the locking member 4 has a matching portion 4b, and a convex head 4c is protruding from the end surface of the matching portion 4b. A retaining ring 5 is connected to the outer surface of the convex head 4c, and the retaining ring 5 protrudes radially out of the matching portion 4b. The retaining ring 5 is a metal part, and the rear end of the protruding head 4c has an anti-slip edge 4c1, and the retaining ring 5 is limited between the end surface of the matching part 4b and the anti-slip edge 4c1 in the front-to-back direction. The outer side of the retaining ring 5 has a guide cone surface 5a, and the outer diameter of the guide cone surface 5a gradually increases from the rear end to the front end of the locking member 4.

[0034] like Figure 4 and Figure 5 As shown, the unlocking key 6 includes an unlocking rod 7 and an outer guide sleeve 8, the outer guide sleeve 8 is sleeved outside the unlocking rod 7, the front end of the unlocking rod 7 has a clamping portion 7a, the clamping portion 7a is elastic, and the inner wall of the clamping portion 7a is radially provided with a recessed clearance groove 7a15, after the clamping portion 7a is sleeved outside the matching portion 4b, the outer guide sleeve 8 is moved to make the clamping portion 7a contract inwardly to form a circumferential fixation with the matching portion 4b, and when the clamping portion 7a and the matching portion 4b are circumferentially fixed, the edge of the retaining ring 5 is located in the clearance groove 7a15. A retaining ring 9 is also threadedly connected in the mounting hole 1b1, and the threaded connection of the locking member 4 is the front end thereof, the locking member 4 passes through the retaining ring 9, and the outer side of the locking member 4 near the front end position has an annular retaining shoulder 4d, and when the front end of the locking member 4 is inserted into the side of the valve stem 2, there is a gap between the rear side of the annular retaining shoulder 4d and the front side of the retaining ring 9.

[0035] Specifically, Figure 4 and Figure 5As shown, the inner side of the middle of the outer guide sleeve 8 has an annular convex shoulder 8a, the middle outer sleeve of the unlocking rod 7 is provided with a support spring 10, and a blocking member 11 is fixed to the outside of the unlocking rod 7. The front end of the support spring 10 abuts against the annular convex shoulder 8a, and the rear end of the support spring 10 abuts against the blocking member 11. When the outer guide sleeve 8 moves backward to overcome the effect of the support spring 10, the clamping portion 7a can expand outward under the effect of its own elastic force. The blocking member 11 is a retaining spring. In practice, the unlocking rod 7 is also provided with a supporting ring 12, which is in clearance with the inner hole of the rear end of the outer guide sleeve 8. The rear end of the support spring 10 abuts against the supporting ring 12, and the supporting ring 12 abuts against the blocking member 11. The outer side of the rear end of the outer guide sleeve 8 has an annular lug 8b. The unlocking rod 7 includes a guide rod 7b, a support spring 10 is sleeved outside the guide rod 7b and a blocking member 11 is also arranged on the guide rod 7b, the clamping portion 7a includes two petals 7a1, both of which are arc-shaped plates, the two petals 7a1 are metal parts, the rear end side wall of the clamping portion 7a has a connecting hole, the adjacent sides of the two petals 7a1 have a recess 7a11 for forming the connecting hole, the front end of the guide rod 7b is located inside the rear end of the clamping portion 7a, the side of the guide rod 7b has a connector 7b located in the connecting hole, the outer side of the two petals 7a1 has a force-bearing surface 7a12 near the front end, and the rear end of the force-bearing surface 7a12 is inclined relative to the front end toward the center line of the guide rod 7b. The front ends of the two petals 7a1 are both protruding with a sheet 7a13, and the side of the matching part 4b is symmetrically provided with two connecting planes 4b1, and the two opposite sides of the two sheet 7a13 are each provided with a clamping plane 7a14, and the clearance groove 7a15 is located on the sheet 7a13 and behind the clamping plane 7a14. In this embodiment, the matching part 4b is connected to two arc surfaces at the two connecting planes 4b1, and the two arc surfaces are concentrically arranged. The maximum outer diameter of the retaining ring 5 is the same as the diameter of the two arc surfaces, which is equivalent to the retaining ring 5 actually protruding radially outside the two connecting planes 4b1. In order to facilitate the operation of rotating the unlocking rod 7, an insertion rod 13 is vertically penetrated and fixed at the rear end of the guide rod 7b.

[0036] The valve stem 2 is in the locked state (such as Figure 1 As shown in the figure, the locking head 4a of the locking member 4 passes through the transition hole and is inserted into the locking hole 2a located on the side of the valve stem 2, so that the valve stem 2 cannot be operated at will by the user. Since the end surface of the matching portion 4b is protruding with a convex head 4c, the convex head 4c is outer-mounted with a retaining ring 5, and the retaining ring 5 protrudes radially outside the matching portion 4b, it is equivalent to the retaining ring 5 blocking the matching portion 4b, so that the user cannot operate the locking member 4 by directly clamping the needle-nosed pliers outside the matching portion 4b. In addition, because the retaining ring 5 is sleeved on the convex head 4c, that is, the retaining ring 5 is freely rotatable relative to the locking member 4, even if the user clamps the needle-nosed pliers outside the retaining ring 5, the locking member 4 cannot be rotated. As a result, the reliability of the anti-theft opening is greatly improved.

[0037] When the manager needs to unlock the valve, the unlocking key 6 is used to operate the locking member 4. Under normal conditions, the outer guide sleeve 8 is always kept in a position where the clamping portion 7a is in a contracted state under the action of the support spring 10. At this time, the inner wall of the front end of the outer guide sleeve 8 is against the front end of the force-bearing surface 7a12 outside the two petal bodies 7a1, so that the front ends of the two petal bodies 7a1 are gathered together (the inner diameter of the front end of the outer guide sleeve 8 is between the outer diameter of the circle where the front end of the force-bearing surface 7a12 is located and the outer diameter of the circle where the rear end of the force-bearing surface 7a12 is located). In this state, the clamping portion 7a cannot be directly sleeved outside the matching portion 4b of the locking member 4. When unlocking is required, first manually push the outer guide sleeve 8 backwards to overcome the action of the supporting spring 10 until its front end retreats to the rear end position of the force-bearing surface 7a12 and maintains this state. At this time, the outer guide sleeve 8 has no restraining force on the front ends of the two petals 7a1, and the front ends of the two petals 7a1 will expand outwards under the action of their own elastic force. In this state, the space between the two sheet bodies 7a13 is larger than the cross-sectional area of ​​the retaining ring 5, so that the user can insert the clamping portion 7a into the mounting hole 1b1 and can be sleeved on the outside of the matching portion 4b of the locking member 4 without being hindered by the retaining ring 5. Then the user removes the push on the outer guide sleeve 8, so that the outer guide sleeve 8 will automatically move forward under the elastic force of the support spring 10 and gather the front ends of the two petals 7a1. At this time, the clamping plane 7a14 of the sheet 7a13 located at the front ends of the two petals 7a1 will abut against the connecting plane 4b1 of the matching part 4b, so that the clamping part 7a and the locking member 4 are circumferentially fixed (the outer edge of the retaining ring 5 is located in the clearance groove 7a15). Finally, the unlocking lever 7 can be turned to drive the locking member 4 to rotate, so that the locking member 4 is separated from the valve stem 2.

[0038] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A mechanical locking ball valve, comprising a valve body (1), an unlocking key (6) and a valve stem (2) vertically arranged in the valve body (1), wherein the valve body (1) has a mounting hole (1b1) arranged horizontally, a locking member (4) is threadedly connected to the mounting hole (1b1), a front end of the locking member (4) is inserted into the valve stem (2), and a rear end of the locking member (4) has a mating portion (4b), characterized in that: The end surface of the matching portion (4b) is provided with a protruding head (4c), and a retaining ring (5) is connected to the outer surface of the protruding head (4c). The retaining ring (5) protrudes radially out of the matching portion (4b). The unlocking key (6) includes an unlocking rod (7) and an outer guide sleeve (8). The outer guide sleeve (8) is sleeved outside the unlocking rod (7). The front end of the unlocking rod (7) has a clamping portion (7a). The clamping portion (7a) is elastic. The inner side wall of the clamping portion (7a) is radially provided with a recessed clearance groove (7a15). After the clamping portion (7a) is sleeved outside the matching portion (4b), the outer guide sleeve (8) is moved to make the clamping portion (7a) shrink inward to form a circumferential fixation with the matching portion (4b). When the clamping portion (7a) and the matching portion (4b) are circumferentially fixed, the edge of the retaining ring (5) is located in the clearance groove (7a15).

2. The mechanical locking ball valve according to claim 1, characterized in that: The retaining ring (5) is a metal part, and the rear end of the protruding head (4c) is provided with an anti-slip retaining edge (4c1).

3. The mechanical locking ball valve according to claim 2, characterized in that: The outer side of the retaining ring (5) is provided with a guide cone surface (5a), and the outer diameter of the guide cone surface (5a) gradually increases from the rear end to the front end of the locking piece (4).

4. The mechanical locking ball valve according to claim 1, 2 or 3, characterized in that: A retaining ring (9) is also threadedly connected in the mounting hole (1b1), and the threaded connection of the locking member (4) is its front end. The locking member (4) passes through the retaining ring (9), and the outer side of the locking member (4) near the front end is provided with an annular retaining shoulder (4d). When the front end of the locking member (4) is inserted into the side of the valve stem (2), there is a distance between the rear side of the annular retaining shoulder (4d) and the front side of the retaining ring (9).

5. The mechanical locking ball valve according to claim 1, characterized in that: The inner side of the middle part of the outer guide sleeve (8) is provided with an annular boss (8a), the middle outer sleeve of the unlocking rod (7) is provided with a support spring (10), and a blocking member (11) is fixed outside the unlocking rod (7). The front end of the support spring (10) abuts against the annular boss (8a), and the rear end of the support spring (10) abuts against the blocking member (11). When the outer guide sleeve (8) overcomes the effect of the support spring (10) and moves backward, the clamping portion (7a) can expand outward under the effect of its own elastic force.

6. The mechanical locking ball valve according to claim 5, characterized in that: The outer side of the rear end of the outer guide sleeve (8) is provided with an annular lug (8b).

7. The mechanical locking ball valve according to claim 5, characterized in that: The unlocking rod (7) comprises a guide rod (7b), the clamping part (7a) comprises two flaps (7a1) both of which are arc-shaped plates, the two flaps (7a1) are both metal parts, the rear end side wall of the clamping part (7a) has a connecting hole, the adjacent sides of the two flaps (7a1) have recesses (7a11) for forming the connecting hole, the front end of the guide rod (7b) is located inside the rear end of the clamping part (7a), the side of the guide rod (7b) has a connecting head (7b1) located in the connecting hole, the outer sides of the two flaps (7a1) near the front end have a force-bearing surface (7a12), and the rear end of the force-bearing surface (7a12) is inclined relative to the front end toward the center line of the guide rod (7b).

8. The mechanical locking ball valve according to claim 7, characterized in that: The front ends of the two petals (7a1) are both protrudingly provided with a sheet body (7a13), the side of the matching portion (4b) is symmetrically provided with two connecting planes (4b1), the opposite sides of the two sheet bodies (7a13) are both provided with a clamping plane (7a14), and the clearance groove (7a15) is located on the sheet body (7a13) and behind the clamping plane (7a14).

9. The mechanical locking ball valve according to claim 1, characterized in that: The valve body (1) comprises a cylindrical neck (1a) and a cylindrical mounting portion (1b) protruding from the outside of the neck (1a); the neck (1a) comprises an inner hole; the valve stem (2) is inserted into the neck (1a); the mounting hole (1b1) is located in the mounting portion (1b); a locking hole (2a) is provided on the side of the valve stem (2); a transition hole for connecting the inner hole of the neck (1a) with the mounting hole (1b1) is provided at the connection position between the neck (1a) and the mounting portion (1b); when the valve stem (2) is in a state of closing the ball valve, the locking hole (2a) is directly connected to the transition hole; the front end of the locking member (4) comprises a locking head (4a); the locking head (4a) is located in the transition hole.

Images